fx-file-server/hugo/docsy/layouts/_partials/version-banner.html

<!-- Check the variable that indicates whether this is an archived doc set.
  If yes, display a banner. -->
  {{ if .Site.Params.archived_version }}
  {{ $color := "primary" }}
  {{ $latest_version := .Site.Params.url_latest_version }}
  {{ $current_version := .Site.Params.version }}
  <div class="pageinfo pageinfo-{{ $color }}">
    {{ with $current_version }}<p>Version {{ . | markdownify }} of the
      documentation is no longer actively maintained. The site that you are
      currently viewing is an archived snapshot. 
      {{ with $latest_version }}For up-to-date documentation, see the 
        <a href="{{ $latest_version | safeURL }}" target="_blank">latest version</a>.</p>
      {{ end }}
    {{ end }}
  </div>
{{ end }}